<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
		/*string*/
			var str="她说'hello,你好啊！'"; 
			document.write(str);
			document.write('<br />');
			str="她说\"hello,你好啊！\"";
			document.write(str);
		/*number*/
			var a=Number.MAX_VALUE;              /*最大值*/
			console.log(a);
			console.log(typeof a);
			 a=Number.MAX_VALUE*Number.MAX_VALUE;/*超过最大值*/
			console.log(a);
			a="abc" * "bcd";                     /*非数值*/
			console.log(a);
		/*boolean*/
			var bool=true;
			bool=false;
			console.log(bool);
		/*NULL*/
			var c=null;
			console.log(c);
		/*undefined*/
			var d;
			console.log(d);
		
		</script>
	</head>
	<body>
	</body>
</html>
